dbus: Fix a bug where we were emitting spurious error messages.

dbus/end_to_end_async_unittest.cc

Index: dbus/end_to_end_async_unittest.cc
diff --git a/dbus/end_to_end_async_unittest.cc b/dbus/end_to_end_async_unittest.cc
index 7ba782ba54870e186c17e3ac3e1f01c67bc76c6b..2f486f41ee182a3eee84b4388f88a44143b68543 100644
--- a/dbus/end_to_end_async_unittest.cc
+++ b/dbus/end_to_end_async_unittest.cc
@@ -55,7 +55,8 @@ class EndToEndAsyncTest : public testing::Test {
                                          "/org/chromium/TestObject");
     ASSERT_TRUE(bus_->HasDBusThread());
 
-    // Connect to the "Test" signal from the remote object.
+    // Connect to the "Test" signal of "org.chromium.TestInterface" from
+    // the remote object.
     object_proxy_->ConnectToSignal(
         "org.chromium.TestInterface",
         "Test",
@@ -63,6 +64,18 @@ class EndToEndAsyncTest : public testing::Test {
                    base::Unretained(this)),
         base::Bind(&EndToEndAsyncTest::OnConnected,
                    base::Unretained(this)));
+    // Connect to the "Test2" signal of "org.chromium.TestInterface" from
+    // the remote object. There was a bug where we were emitting error
+    // messages like "Requested to remove an unknown match rule: ..." at
+    // the shutdown of Bus when an object proxy is connected to more than
+    // one signal of the same interface. See crosbug.com/23382 for details.
+    object_proxy_->ConnectToSignal(
+        "org.chromium.TestInterface",
+        "Test2",
+        base::Bind(&EndToEndAsyncTest::OnTest2Signal,
+                   base::Unretained(this)),
+        base::Bind(&EndToEndAsyncTest::OnConnected,
+                   base::Unretained(this)));
     // Wait until the object proxy is connected to the signal.
     message_loop_.Run();
   }
@@ -122,6 +135,12 @@ class EndToEndAsyncTest : public testing::Test {
     message_loop_.Quit();
   }
 
+  // Called when the "Test2" signal is received, in the main thread.
+  void OnTest2Signal(dbus::Signal* signal) {
+    dbus::MessageReader reader(signal);
+    message_loop_.Quit();
+  }
+
   // Called when connected to the signal.
   void OnConnected(const std::string& interface_name,
                    const std::string& signal_name,